/* =========================
   HOME VIEW (SCENE)
========================= */

.home-container {
    padding: 40px 24px;
    max-width: 1200px;
    margin: 40px auto;
    border-radius: 24px;
}

/* Scene-level text */
.home-title {
    font-size: clamp(2rem, 5vw, 2.4rem);
    text-align: center;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.home-description {
    text-align: center;
    font-size: 18px;
    line-height: 1.6;
    max-width: 720px;
    margin: 0 auto 36px auto;
    color: var(--text-secondary);
}

.home-help-strip {
    margin: 0 auto 20px;
    max-width: 960px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.home-help-item {
    border: 1px solid var(--surface-border);
    border-radius: 14px;
    background: var(--surface-elevated);
    padding: 12px;
}

.home-help-title {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 6px;
}

.home-help-text {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.45;
}

/* =========================
   FLASHCARD GRID
========================= */

.flashcard-grid {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.flashcard-empty {
    opacity: 0.6;
    text-align: center;
    grid-column: 1 / -1;
    color: var(--text-secondary);
}

/* =========================
   FLASHCARD CARD (ACCENT SURFACE)
========================= */

.flashcard-card {
    background: var(--accent-primary);
    padding: 18px;
    border-radius: 14px;
    cursor: pointer;

    color: #ffffff;

    border: none;
    box-shadow: var(--shadow-soft);

    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.flashcard-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-elevated);
}

/* Surface-scoped text */
.flashcard-title {
    font-weight: 600;
    font-size: 18px;
    color: #ffffff;
    min-width: 0;
    overflow-wrap: anywhere;
}

.flashcard-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
}

.flashcard-title-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    position: relative;
}

.flashcard-menu-btn {
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        transform var(--transition-fast),
        border-color var(--transition-fast);
}

.flashcard-menu-btn:hover {
    background: rgba(255, 255, 255, 0.28);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-1px);
}

.flashcard-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 140px;
    padding: 8px;
    border-radius: 12px;
    border: 1px solid var(--surface-border);
    background: var(--surface-elevated);
    box-shadow: var(--shadow-elevated);
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition:
        opacity var(--transition-fast),
        transform var(--transition-fast);
    z-index: 10;
}

.flashcard-menu.open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.flashcard-menu-item {
    width: 100%;
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        transform var(--transition-fast),
        border-color var(--transition-fast);
}

.flashcard-menu-item:hover {
    background: var(--surface-hover);
    transform: translateY(-1px);
}

.flashcard-menu-item.danger {
    color: var(--accent-danger);
}

.flashcard-rename {
    margin-top: 10px;
    display: none;
    align-items: center;
    gap: 10px;
}

.flashcard-card.is-renaming .flashcard-rename {
    display: flex;
}

.flashcard-card.is-renaming .flashcard-title-row {
    opacity: 0.7;
}

.flashcard-rename-input {
    flex: 1;
    min-width: 0;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    font-size: 14px;
    outline: none;
    transition:
        background var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.flashcard-rename-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.flashcard-rename-input:focus {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.75);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.flashcard-rename-input.invalid {
    border-color: var(--accent-danger);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-danger), transparent 75%);
}

.flashcard-rename-actions {
    display: flex;
    gap: 8px;
}

.flashcard-rename-btn {
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition:
        background var(--transition-fast),
        border-color var(--transition-fast),
        transform var(--transition-fast);
}

.flashcard-rename-btn.primary {
    background: rgba(255, 255, 255, 0.28);
    border-color: rgba(255, 255, 255, 0.55);
}

.flashcard-rename-btn:hover {
    background: rgba(255, 255, 255, 0.28);
    transform: translateY(-1px);
}

.flashcard-meta {
    margin-top: 6px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
}

/* =========================
   ACTION
========================= */

.home-action {
    margin-top: 50px;
    text-align: center;
}

/* Structural wrapper only */
.card-wrapper {
    background: transparent;
    color: inherit;
}

/* =========================
   EMPTY STATE (ACCENT SURFACE)
========================= */

.empty-collection {
    padding: 40px;
    text-align: center;
    max-width: 620px;
    margin: 70px auto;

    background: var(--accent-primary);
    color: #ffffff;

    border-radius: 18px;
    box-shadow: var(--shadow-soft);

    animation: fadeIn 0.3s ease;
}

/* =========================
   SURFACE BUTTON (MATCH LANDING CTA)
========================= */

.surface-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 14px 26px;
    font-size: 18px;
    font-weight: 500;

    background: var(--accent-primary);
    color: #ffffff;

    border-radius: 12px;
    border: none;

    box-shadow: var(--shadow-soft);
    cursor: pointer;

    transition:
        transform var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.surface-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-elevated);
}

.surface-btn:active {
    transform: translateY(0);
}

@media (max-width: 900px) {
    .home-container {
        padding: 18px 12px;
        margin: 10px auto 18px;
    }

    .home-description {
        font-size: 15px;
        margin-bottom: 18px;
    }

    .home-help-strip {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-bottom: 14px;
    }

    .flashcard-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .flashcard-card {
        width: 100%;
        padding: 16px 14px;
    }

    .flashcard-menu-btn,
    .flashcard-rename-btn,
    .surface-btn {
        min-height: 44px;
    }

    .home-action {
        margin-top: 20px;
    }

    .surface-btn {
        width: 100%;
    }
}